SOLUTION: Sam leaves for the store on his skateboard at 8 mph. His skateboard breaks when he gets to the store, so he immediately goes home at a speed of 4 mph. What is the round trip distan

Question 675768: Sam leaves for the store on his skateboard at 8 mph. His skateboard breaks when he gets to the store, so he immediately goes home at a speed of 4 mph. What is the round trip distance if it took 2 hours?
Found 2 solutions by josmiceli, Alan3354:
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = the one-way distance to store
Let = time going to store ( one-way time )
given:
(1)
(2)
------------------
Substitute (1) into (2)
(2)
(2)
(2)
(2) ( 40 minutes )
and
(1)
(1)
(1)

miles round-trip
check answer:
(2)
(2)
(2)
(2)
(2)
(2)
OK

Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Sam leaves for the store on his skateboard at 8 mph. His skateboard breaks when he gets to the store, so he immediately goes home at a speed of 4 mph. What is the round trip distance if it took 2 hours?
---------------
Avg speed for the round trip = 2*8*4/(8+4) = 64/12
Avg = 16/3 mi/hr
d = r*t = 2*16/3
RT distance = 32/3 miles

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